9. If oxygen is in a compound, what would its oxidation number be
ANS -2
10. Which of the following pH values would lemon juice likely have
ANS 2
11. What is a pentose
ANS 5 carbon sugar
12. What is the oxidation state of the sulfur atom in sulfuric acid (H2SO4)
ANS 6
13. How many neutrons does carbon 14 have
ANS 8
14. How many protons does potassium have
ANS 19
15. How many amino acids are essential for human life
ANS 20 amino acids
16. 0 K is equal to C
ANS -273
17. What does amphoteric mean
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